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1.
脱落酸、多效唑和油菜素内酯对低温期间香蕉过氧化物酶和电导率的影响 总被引:16,自引:0,他引:16
在人工气候箱中模拟寒潮对香蕉幼苗造成的低温冷害 ,研究脱落酸、多效唑和油菜素内酯对低温胁迫期和低温胁迫恢复期香蕉幼苗叶片过氧化物酶和相对电导率的影响。试验表明 ,叶面喷施适量脱落酸、多效唑和油菜素内酯能够提高低温胁迫期和恢复期香蕉叶片的过氧化物酶活性并且降低叶片相对电导率。其最适浓度脱落酸为 2 0~ 2 5mg/ L;多效唑为 15~ 30 m g/ L;油菜素内酯为 0 .9~ 1.5m g/ L。 相似文献
2.
The effect of exogenous brassinosteroids (BR) on the flowering induction of Pharbitis nil was examined. Generally plants treated with brassinolide and castasterone form less number of flowers than control plants, but degree of flowering inhibition was depended on the concentration and the method of BR application as well as the length of the inductive dark period. In plants regenerated from sub-induced apices treated with brassinolide at concentration of 1 and 10 M the flower formation was inhibited completely. 相似文献
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Improved paclitaxel accumulation in cell suspension cultures of Taxus chinensis by brassinolide 总被引:3,自引:0,他引:3
When brassinolide was added at 17 ng l–1 to Taxus chinensis cell suspension cultures, the paclitaxel content was increased by over 100% to 580 g g–1 dry weight. Brassinolide may therefore be a novel regulator of paclitaxel biosynthesis. 相似文献
5.
Franck-Duchenne Martine Wang Yuwen Ben Tahar Sofia Beachy Roger N. 《Plant Cell, Tissue and Organ Culture》1998,53(2):79-84
In vitro regeneration of sweet pepper (Capsicum annuum L. cvs Jupiter and Pimiento Perfection) has been performed via direct
organogenesis. The resulting shoot-buds were placed on media containing 24-epi-brassinolide (EBR) 0.1 μM, a plant steroid
lactone, in the presence or absence of zeatin 9.1 μM plus GA3 5.2 μM for further stem elongation. Different responses to these
treatments were recorded depending upon the protocols used and the genotypes tested. It appears that EBR does not always act
directly on stem elongation but may be an elicitor and/or an enhancer of elongation in concert with endogenous and other exogenously
added growth regulators. Elongated shoots were easily rooted with alpha-naphtalenacetic acid 0.5 μM (0.1 mgl-1) and transfered
to soil, and following acclimation were taken to maturity in the greenhouse.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
6.
7.
A.?M.?R.?FerrieEmail author J.?Dirpaul P.?Krishna Krochko W.?A.?Keller 《In vitro cellular & developmental biology. Plant》2005,41(6):742-745
Summary Experiments were conducted to determine the effects of brassinosteroids on microspore embryogenesis in Brassica species. Two compounds, 24-epibrassinolide (EBR) and brassinolide (BL), were evaluated. An increase in embryogenesis was
observed in all Brassica napus lines evaluated, including Topas 4079 and several recalcitrant cultivars: Garrison, Westar, and Allons. Microspore embryogenesis,
calculated as the number of embryos at 21 d of culture, was increased in the recalcitrant cultivars up to 12 times that of
the control. An increase in microspore embryogenesis was also observed for B. juncea when EBR or BL was added to the culture medium. In constrast, no significant increases in embryogenesis was observed for
several other Brassica species evaluated (i.e. B. carinata, B. nigra, and B. rapa). The addition of brassinosteroids to the induction media did not affect the subsequent conversion of the embryos to plantlets,
but did appear to influence chromosome doubling. 相似文献
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Soybean hypocotyl segments were treated in the dark with 24-epibrassinolide (BR) at a range of concentrations for different durations. The maximum effect on adventitious root induction, both in terms of number and length was obtained at very low concentration (0.0001 ppm) of BR applied for 8 h. Higher concentrations were supraoptimal unless applied for a shorter period (4 h). BR was ineffective when applied at low concentration in continuous light. 相似文献
10.
自1979年Grove等首次从油菜(&.wM-。。WL·)花粉中分离出油菜素内酯(brassinolide,BR)以来,人们已在该激素的生理反应和对植物生长发育等方面进行了许多研究(Kalinich等1985,Mandava1988,吴登如和赵硫橘1993)。但由于这类激素在10-'mol/L浓度水平就能诱导大豆、水稻等多种植物细胞的生长和分裂(Sasse1991),而且在植物体内含量极低,因此用传统的方法研究它的作用方式非常困难。目前,利用激素突变体来研究激素代谢及其分子机制已有不少成功的例子,如生长素(Keily和Bradford1986,Lincoln等1990)、赤霉素(Singh… 相似文献